Links to presentation websites that will help you create engaging, memorable presentations:
http://prezi.com/ - Create presentations live and on the web.
http://www.mixbook.com/ - Create a photobookonline and share it with others.
http://www.photoshow.com/home/start - Upload photos from your computer and create a digital photoshow with music. Then share online.
http://voicethread.com/ - A collaborative, multimedia slideshow that allows people to navigate slides and leave comments.